Transmission mechanism.



a l 0,3 INVIENITOR -B. A. GRAMM. Y TRANSMISSION MECHANISM.

7 APPLICATION FILEU FEB. 12. 1916. 1,183,296.

m i l i i .P V i Y BENJAMIN A. GRAMM, OF LIMA, OHIO.

TRANSMISSION MECHANISM.

Specification of Letters Patent.

Application filed February 12, 1916. Serial No. 77,830.

To all whom it may concern:

Be it known tl1ill3l,BENJA) IIN A; GRAMM, a cltizen of the United States jof America,

companyingdrawings.

This invention relates to improvements in transmission mechanisms for use in selfpropelled vehicles, such as automobiles, motor-trucks and the like; and an object of this invention is to provide a transmission mechanism in which the gears, cores, slidable clutch-members andother partsrfof the transmission mechanism are held'firmly in place on the transmission-shaft and thense of numerous screws, nut and pins (which are never satisfactory in" operation) is avoided.

Another object of this invention isto pro vide a transmission mechanism in which the slidable clutch-members are formed with jawsv some of which are lower than others, whereby it is insured that the aws on the slidable clutch-member cannot slip past more than one of the jaws formed one lateral face of-the gear without becoming engaged therewith.

Other features of this invention are set out in the description and claims which folengine-shaft c. The arrangement of the low hereinafter.

In the drawings illustrating the principle of this invention and the best mode now known to me of applying that principle, Figure 1 is a plan view of a transmission mechanism embodying this invention, parts being shown in section for clearness and the cover of the transmission case being omitted; Fig. 2 is a. section on the line 2-2 of Fig. 1; Fig. 3 is-an elevation of a slida'ble clul member; Fig. 4 is a section on the 1 e of Fig. 1'; and Fig. 5 is a section on the line 55 of Fig. 1.

In the transmission-case a, there is rota tably mounted the transmission-shaft b, the engine-shaft or m0tor-shaft c and the counter-shaft d. On the transmission-shaft b, there are loosely mounted the idler-gears e, f, g and h which mesh, respectively, with the gears e, f, (7 and k that are mounted fast on the counter-shaft d. On the latter shaft, there is mounted fast a spur-gear i which meshes with a pinion j that is keyed on the nular recess 0.

end of a nut w is screwed'on the threaded front parts so far described is old. The transmis- Patented May 16,1916. 7

sion-shaft Z) is formed with several lengthare forced into the recess 0 in the ring 0-.

Over these.spacer-keys 3), there is. now slipped into place the reversing dog or clutch-member g after which an annularcap 1' is pressed tightly against the spacerkeys 7), the front ends of which enter a recess 7* formed in this annular cap 1". Since the ends of the spacer-keys. p are securely held by the walls of the recesses o, 1-, these spacer-keys 7) are firmly held down in place in the grooves in in the transmission-shaft b. On thelatter, there is next slipped the core 8, together with the ball-bearings s and the gears e, f. There is then mounted, on the transmission-shaft b, a second annular cap 1" formed with a recess 01 into which are driventhe real-ends of the spacer-keys 72 that are mounted in grooves 70 formed in the transmission shaft 1). Over these spacer keys Z). there is slipped the slidable clutch t; and the front endsof these spacerkeys 2) are held in a recess 7 formed in a third annular cap 7'. A second core 8 is then mounted, on the transmission-shaft b, to-

gether with ball-bearings s and the gears g,

it. Afourth annular cap 1" is then slipped on the transmission-shaft b and the rear ends of the spacer-keys 79 are forced into the recess 7- formed in this cap r. 'A dog or clutch member a is then slipped over the spacerkeys 7)", after which a washer o is forced over the front ends of the latter. The bearing '10 is next slipped over .the front the transmission shaft 6 and end thereof and is held in place by a cotterpin 1 It is to be noted that this nut w and cotter-pin 11 are the only nut and pin used in the assembly of the parts hereinbefore described. The holes 6 formed in the slidable clutch-member t afford room for the spacer-keys 79 and permit this slidable clutch to be shoved back and, forth along the transmissi0n-shaft over these spacerkeys 79. I l

The slidable clutch member 25 18 formed with jaws 2" between which are located jaws I" that are about one-eighth of an inch lower than the jaws f. This novel feature of construction of the clutch-member 2 results in insuring" that the jaws '2 of the clutchmember I will en a'agre with the clutch-jaws 7". formed on lateral faces of the gears 7'. Q respectively. without slipping past more than one of these jaws f.

It is to be observed'that tll? annular retaining devices 7' not only serve to hold'the spacer-keys p. 7/, p". in the grooves Zr in the shaft 7), but also serve to keep the balls .5" in the outer races of the cores or mountings s forthe toothed wheels 0, f, g. 71). The spacer-keys maintain the wheel-mountings a indefinite spaced relation with respect to each other.

I claim:

1. The combination of a shaft formed with grooves; synteer-keys mounted in said grooves; and wheel-mountings on said shaft and between said spacer-keys; which hold said wheel-u1ountings in spaced relation.

2. The combination of a shaft formed with grooves: spacer-keys mounted in said grooves: a wheel mounting on said shaft, along which said wheel-mounting is spaced by said spacer-keys: a clutcl-i-member slidably mounted on said shaft and keyed thereto by said spacer-keys; and a wheel mounted on saidwheel-mounting and aranged to be clutched by said clutcl11nember.

3. The combination of a shaft formedwith grooves; spacer-keys mounted insaidgrooves; means for holding said spacerkeys in said grooves: and wheel-mountings onsaid shaft and between said spacer-keys, which hold said wheel-mountings inspaced relation.

r. The con'ibination of a shaft formed with grooves; spacer-keys mounted in said wheel-mountings being formed with ballraces;'balls in said races; wheels mounted on said wheel-mountings andfletaining devices formed with recesses the walls of which engage the ends of. said spacer-keys and retain the latter in said grooves and said balls in said races.

Signed at the borough of Manhattan. city.

county and State of. New Iork. this third dayof l ebruary, A. 1)., 1916, in the presence of the two undersigned witnesses,

BENJi-MWIIN-A: GRAMM.

Witnesses ELEANOR F snnn, H. E. \VHEELER.

grooves; wheel-mountings on said shaft and 

